#5746 NORM Update.: msh0 interface with a bogus name (msh0_rename)

[Zarro Boogs per Child]

#5746: msh0 interface with a bogus name (msh0_rename)
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  Reporter:  carrano  |       Owner:  cscott  
      Type:  defect   |      Status:  new     
  Priority:  normal   |   Milestone:  Update.2
 Component:  distro   |     Version:          
Resolution:           |    Keywords:  review? 
  Verified:  0        |    Blocking:          
 Blockedby:           |  
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Changes (by Blaketh):

 * cc: Blaketh (added)


Comment:

 As the previous fix prevented NetworkManager from learning the existence
 of wired interfaces,
 Mike Stone and I have written a slightly less broad rule for udev that
 disables all rules on msh* interfaces rather than all net interfaces.
 This rule was released in olpc-utils-0.71-1, and is ready for testing.
 Sadly this patch will not work well for laptops with more than one mesh
 interface.  Laptops with an Active Antenna may show race conditions unless
 a more comprehensive fix is created.

 My thoughts on a conservative way to write udev rules that will work
 stably with such devices:
 A) Device index should persist according to MAC address.
 B) A pair of mesh, ethernet interfaces that share a MAC address should
 share a device index.
 C) It is hard for me to figure out whether a given device is libertas or
 not, so for each device hwaddr I see I shall generate a pair of rules as
 follows:
   i) Find the appropriate index i for this MAC address in the persistence
 store.
   ii) The first rule takes devices named msh* with this MAC and renames
 them msh$i.
   iii) The second rule takes devices named eth* with this MAC and renames
 them eth$1.
 D) The storage will be in /etc/udevd/rules.d/70-persist-net.rules.
 E) The generation shall take place in our fork of
 /lib/udev/write_net_rules from the udev package in the extras/ directory.
 Apologies for the poor formatting, but I am excited to attack more bugs!

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Ticket URL: <http://dev.laptop.org/ticket/5746#comment:19>
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